Machine for making buckets for turbines.



Y O. W. DAKE. 'M-AOHINE FOR MAKING nuoxms FOR TURBINES. APPLICATION FILED 113.18, 1911 1,035,645. Patented Aug. 13, 1912.

2 SHEETS-SHEET 1.

lilll ll ii.

- UNITED STATES PATENT OFFICE.

CHARLES'W. DARE, 0F GRAND RAPIDS, MICHIGAN, ASSIGNOR TO PYLE-NATIONAL ELECTRIC HEADLIGHT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

MACHINE FOR MAKING BUCKEIS FOR TURBINES.

Application filed February 13, 1911. Serial No. 608,331.

e and State of Michigan, have invented new and useful Improvements in Machines for Making Buckets for Turbines, of which the following is a specification.

My present-invention relates to machines for making buckets for turbines, and its object is to provide improved punches and cooperating parts for cutting and forming such buckets. This object is attained by, and my present invention is preferably embodied in, the following described mechanism, illustrated by the accompanying drawings, in which:

Figure 1 shows a portion of a strip of sheet metal from which the buckets are to be cut and formed: Fig. 2 represents the same after the first cutting operation has been performed: Fig. 3 represents the same, showing on its right hand side the further formation of the same bucket after the second operation has been performed, andshowing on its left hand side the first cut: ting (as shown in Fig. 2) to form another bucket: Fig. 4 represents the same, showing at its right hand side the complete formation of the first bucket after theperformance of the third 0 eration thereon,'; and showing in its midd e plortion the second operation (as shown on t e right of Fig. 3) to form another bucket, and further showing on its left hand portion the first cuttin (shown in Fig. 2 and on the left of Fig. 3% to form a third bucket: Fig. 5 is a rear view of a completed bucket lookin toward the concave inner side of its curved front wallr. Fig. 6 is a bottom plan view of the same: Fig. 7 is a to plan view of the stationary die portion 0 my machine: and Fig. 8 is a frontview of my machine, the stationary parts thereof being shown in vertical section on the line Z-Z of Fig. 7.

In the machine illustrated, three operations complete-the bucket, and three buckets are being formed at each motion of the machine. A st-rip l of proper material, of suitable width and thickness, is fed into the machine from the left of Figs. 7 and 8 until arrested by the stop 2. The entire movable or punch portion 3 of the machine is forced downward into its correspondlng die or the stationary portion of my machine, by a reciprocating carrying plunger 4 (operated by suitable power), and performs simultaneously the three formative operations on three several buckets. The punches 6 and 7 (with cooperating dies having registering orifices 30 and 31) cut away the parts 8 and punch the hole 9, this being the first formative operation performed by the machine.

The bucket blank has now the shape shown in Fig. 2, with outer and inner wall portions, 10 and 11 respectively, and a forward wall portion 12 with extensions 13. In the second formative operation, the punch 14 with its die portion (having the orifice 32) cuts away t e part 15 while the forming punches 16 bend the extensions 17 downward over the edges 18 of their dies to form ears as particularly shown in Fig. 5 for attaching the buckets to their support. The blank now appears as in the center of Fig.

Patented Aug. 13, 1912.-

4: In the third and last formative operation of the machine to produce the completed bucket, the pilot pin 19 engages the hole 9 to secure the blank in its proper position, and thereupon the cutting punch 20 with cooperatmg die having the orifice 33, cuts away the part 21 and the blank is thus severed from the strip 1; the forming punch 22, having a curved face as shown, bends the forward wall portion 12 downward between the edges 23 of its die having the orifice 34, to form, together with the extensions 13, the curved forward wall 24 of the bucket, and also bends the end portions 10 and 11 upward between the edges 25 of said die.

Slight indentations 2'6 and 27 out between the portion 12 and the portions 10' and 11 respectively of the blank ,permit the more perfect joining of these portions when the blank is bent in the last operation.

A suitable plate 28 through which the punches pass serves to disengage the blanks from them.

Not confining myself to the details of construction shown and described, I claim:

1. In a machine of the character described, a die provided with oppositely-disposed openings similarly shaped in plan view and oppositely faced, the internal wall of each openin having in its middle part a recessed portion extending outwardly toward the side of the die, and at one end a second recessed portion extending .outwardl toward the side of the die, and at extension toward the middle of the die, and cooperating cutting punches faced correspondingly to said openings.

2. In a machine of the character described, a die provided with oppositely-disposed openings similarly shaped in plan view and oppositely faced, the internal wall of each opening having in its middle part a recessed portion extending outwardly toward the side of the die, and at one end a second recessed portion extending outwardly toward the side of the die, and cooperating cutting punches faced correspond ingly to said openings, said die being pro- 'vided also with a third opening 31, and a cooperating cutting punch 7.

3. In a machine of the character described, .a die provided with oppositely-disposed openings similarly shaped in plan view and oppositely faced, the-internal wall of eachopening having in its middle part a recessedportionextending outwardly toward the side of the die, and at one end a second recessed portion extending i outwardly toward the side of the die, and co-. operating cutting punches faced correspondingly to said openings; and a second die provided with oppositely-disposed openings similarly shaped in plan view and having edges 18, and cooperating forming punches 16, said second die being also provided with a third opening 32 and a cooperating cutting punch 14 faced correspondingly to said opening 32.

4.'In a machine of the character described, a die provided" with oppositely-disposed openings similarly shaped in plan view and oppositely faced, the internal wall of each opening having in its middle part a recessed portion extending outwardly toward the side of the die, and atom end a second recessed portion extending outwardly toward the side of the die, and 00- operating cutting punches faced correspondingly to said openings; and a second die provided with oppositely-disposed openings similarly shaped in plan view and having edges 18, and cooperating forming punches 16, said second die being also provided with a third opening 32 and a cooperating cutting punch 14 faced correspondingly to said opening 32; and a third die provided with an opening 33 and a cooperating cutting punch 20 faced correspondingly to said opening 33, and also provided with an opening 34 and a cooperating forming punch 22.

5. In a machine of the character described, a die provided with oppositely-disposed openings similarly shaped in plan view and oppositely faced, the internal wall of each opening having in its middle part a recessed portion extending outwardly toward the side of the die, and at one end a second recessed portion extending outwardly toward the side of the die, and cooperating cutting punches faced correspondingly to said openings; and a second die provided with oppositely-disposed openings similarly shaped in plan view and having edges 18, and cooperating forming punches 16, said second die being also provided with a third opening 32 and a cooperating cut ting punch 14 faced correspondingly to said opening 32; one of said dies being provided with another opening and a cooperating nesses.

. CHARLES W. DAK-E. Witnesses:

MARY S. TOOKER, MARY SOHULTE. 

